Why do most humidifiers require annual cleaning and media replacement?
A) A chemical reaction between the media and the water causes a crusty white buildup.
B) The media is slowly dissolved by the water used in the humidifier.
C) Minerals in the water are left behind in the sump and media.
D) The water attracts dirt from the air.
C
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What act required all packaged foods to bear nutrition labeling?
A) Meat Inspection Act B) Food and Drug Act C) Food Additives Amendment D) Nutrition Labeling and Education Act
Significant structural damage over a large area can be expected after windstorms, tornadoes, or hurricanes because:
A. wind loads are considered as part of the structural design. B. of a lack of early warnings from the National Weather Service. C. unpredictable seismic events affect important public and critical infrastructure. D. many buildings were constructed before stringent requirements for wind loads appeared in model building codes.
The equalizer line of an externally equalized TXV is best attached _____
a. downstream of, and near, the sensing bulb b. at the inlet of the evaporator coil c. downstream of any suction line traps d. downstream of any other valves in the suction line
The ERG is primarily a guide to aid first responders in _____, and protecting themselves and the general public during this initial response phase of the incident.
Fill in the blank(s) with the appropriate word(s).